ArticleACS nano2021
Single Trap States in Single CdSe Nanoplatelets.
Article in ACS nano, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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Who cites it
9 citing papers in PubMed.
- Article
- Article
- Hot-carrier trapping preserves high quantum yields but limits optical gain in InP-based quantum dots.Nature communications · 2025Article
- Sub-millielectronvolt Line Widths in Polarized Low-Temperature Photoluminescence of 2D PbS Nanoplatelets.Nano letters · 2024Article
- A single nanophotonic platform for producing circularly polarized white light from non-chiral emitters.Nature communications · 2024Article
- Investigation of the Influence of Structure, Stoichiometry, and Synthesis Temperature on the Optical Properties of CdTe Nanoplatelets.Nanomaterials (Basel, Switzerland) · 2024Article
- Article
- Cation Exchange and Spontaneous Crystal Repair Resulting in Ultrathin, Planar CdS Nanosheets.Chemistry of materials : a publication of the American Chemical Society · 2023Article
- Biexciton Blinking in CdSe-Based Quantum Dots.The journal of physical chemistry letters · 2023Article
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Authors and funding
7 authors.
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Abstract
Trap states can strongly affect semiconductor nanocrystals, by quenching, delaying, and spectrally shifting the photoluminescence (PL). Trap states have proven elusive and difficult to study in detail at the ensemble level, let alone in the single-trap regime. CdSe nanoplatelets (NPLs) exhibit significant fractions of long-lived "delayed emission" and near-infrared "trap emission". We use these two spectroscopic handles to study trap states at the ensemble and the single-particle level. We find that reversible hole trapping leads to both delayed and trap PL, involving the same trap states. At the single-particle level, reversible trapping induces exponential delayed PL and trap PL, with lifetimes ranging from 40 to 1300 ns. In contrast with exciton PL, single-trap PL is broad and shows spectral diffusion and strictly single-photon emission. Our results highlight the large inhomogeneity of trap states, even at the single-particle level.
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